公开(公告)号：US3936666A

公开(公告)日：1976-02-03

申请号：US505970

申请日：1974-09-16

申请人： Walter R. Hogg ,  Edward Neal Doty

发明人： Walter R. Hogg ,  Edward Neal Doty

IPC分类号： G01N15/12 ,  G01N15/00

CPC分类号： G01N15/1227

摘要： A particle study apparatus which in response to passage of particles in suspension through a sensing device produces electrical pulses which are proportional in amplitude to the size of the respective particles. The apparatus includes a system for ascertaining the particle size above and below which size predetermined fractions of one of the total mass and total number of the particles in suspension are respectively included. If total mass is desired electrical quantities are accumulated in response to each electrical pulse which are proportional to the amplitudes of the electrical pulses. If total number is desired constant electrical quantities are accumulated in response to each electrical pulse. The electrical quantities are designated as being in one of two categories depending upon whether the electrical pulses producing same are greater than or less than a variable threshold. The variable threshold is varied in response to the accumulation of the electrical quantities in order to produce a desired relationship between the quantities such that the accumulated quantities are indicative of the relationship. These quantities are calibrated according to size in order to yield an output representing the dividing size of one of the mass or number of particles in the particulate system.

摘要翻译： 一种粒子研究装置，其响应于通过感测装置的悬浮液中的颗粒的通过而产生电脉冲，其在幅度上与各个颗粒的尺寸成比例。 该装置包括用于确定高于和低于该粒度的粒度的系统，分别包括悬浮液中的总质量和总数之一的预定分数。 如果需要总质量，则响应于与电脉冲幅度成比例的每个电脉冲积累电量。 如果需要总数，则响应于每个电脉冲而累积电量。 根据产生电脉冲的电脉冲是否大于或小于可变阈值，电量被指定为两类之一。 可变阈值响应于电量的积累而变化，以产生所述量之间的期望关系，使得累积量表示关系。 这些量根据尺寸进行校准，以产生表示颗粒系统中颗粒质量或数量之一的分隔尺寸的输出。

公开(公告)号：US4009443A

公开(公告)日：1977-02-22

申请号：US564722

申请日：1975-04-03

申请人： Wallace H. Coulter ,  Walter R. Hogg ,  Millard D. Longman, Jr. ,  Stephen Campbell ,  Edward Neal Doty

发明人： Wallace H. Coulter ,  Walter R. Hogg ,  Millard D. Longman, Jr. ,  Stephen Campbell ,  Edward Neal Doty

IPC分类号： G01N15/12 ,  H03K21/02 ,  H03K5/20 ,  G01N27/00

CPC分类号： H03K21/02 ,  G01N15/1227

摘要： A method and apparatus for correcting a particle pulse count subject to coincidence error is disclosed wherein particle pulses, developed in response to passage of particles in a particulate system through a sensing zone, are counted for a predetermined period of time. The predetermined period of time is increased or extended in response to each pulse counted by a time increment that is related to a characteristic of the counted pulse, such as the pulse width, duration, or amplitude. The total additional time period allows the counting of additional particle pulses such that the total count at the end of the extended time period is an error corrected count for the number of particles detected in the predetermined time period.

摘要翻译： 公开了一种用于校正受到重合误差的粒子脉冲计数的方法和装置，其中响应于颗粒系统中的颗粒通过感测区域而产生的颗粒脉冲被计数预定时间段。 响应于与计数脉冲的特性（例如脉冲宽度，持续时间或幅度）相关的时间增量计数的每个脉冲，预定时间段被增加或延长。 总的附加时间段允许对附加粒子脉冲进行计数，使得延长时间段结束时的总计数是在预定时间段内检测到的粒子数目的误差校正计数。

公开(公告)号：US3936741A

公开(公告)日：1976-02-03

申请号：US485160

申请日：1974-07-02

申请人： Wallace H. Coulter ,  Walter R. Hogg ,  Edward Neal Doty ,  Millard D. Longman ,  Stephen Campbell

发明人： Wallace H. Coulter ,  Walter R. Hogg ,  Edward Neal Doty ,  Millard D. Longman ,  Stephen Campbell

IPC分类号： G01N15/12 ,  H03K21/02 ,  G01N27/00 ,  H03K5/20

CPC分类号： H03K21/02 ,  G01N15/1227

摘要： A method and apparatus for correcting a particle pulse count subject to coincidence error is disclosed wherein particle pulses, developed in response to passage of particles in a particulate system through a sensing zone, are counted for a predetermined period of time. The predetermined period of time is increased or extended in response to each pulse counted by a time increment that is a function of a characteristic of the counted pulse, such as the pulse width, duration, or amplitude. The total additional time period allows the counting of additional particle pulses such that the total count at the end of the extended time period is an error corrected count for the number of particles detected in the predetermined time period.

摘要翻译： 公开了一种用于校正受到重合误差的粒子脉冲计数的方法和装置，其中响应于颗粒系统中的颗粒通过感测区域而产生的颗粒脉冲被计数预定时间段。 响应于作为脉冲宽度，持续时间或幅度等计数脉冲的特性的函数的时间增量而计数的每个脉冲，预定时间段被增加或延长。 总的附加时间段允许对附加粒子脉冲进行计数，使得延长时间段结束时的总计数是在预定时间段内检测到的粒子数目的误差校正计数。